Frullania rio-janeirensis (Raddi) Ångstr.

Silva, Jainara Pereira, Oliveira-da-Silva, Fúvio Rubens, Ilkiu-Borges, Anna Luiza & Fernandes, Rozijane Santos, 2021, Leafy liverworts of Chapada das Mesas National Park: a floristic survey and checklist of the leafy liverworts of Maranhão state, Brazil, Check List 17 (1), pp. 479-495 : 485

** Frullania rio-janeirensis (Raddi) Ångstr.

Figure 3C

Material examined. BRAZIL • Maranhão, município de Carolina, Parque Nacional Chapada das Mesas, Rio Farinha , sobre tronco de árvore próximo à corrente d´água; 06°59′S, 049°09′W; alt. 197 m; 6 Jun. 2018; JAS Silva 203; CCAA 1645 .

Identification. Plants green to brown, irregularly (bi)pinnate branched. Hemiphyll entire associated with a lobule. Leaves subimbricate to imbricate, orbicular, slightly convex, margins entire, dorsal base auriculate, apex rounded, slightly plane; median cells isodiametric, trigones nodulose. Lobules erect, subparallel to the stem, galeate with an oblong laminal portion, rarely laminate, beak long, not decurrent. Stylus filiform, 2‒3 cells in a row, 1‒2 cell wide at base. Underleaves imbricate, orbicular, 1/6 bifid, margins entire, recurved, apex rounded, base rounded to auriculate, plane to recurved, insertion line curved.

Widely distributed in Brazil, this species is recognized by lobules galeate with a long beak and an oblong laminal portion (as large as the galeate portion) and perianth 4-keeled.

Description and illustration. Schuster (1992: 254–260, fig. 816).

Lejeuneaceae

Figures

Figure 3. Leafy liverworts of the Chapada das Mesas National Park; A. Frullania intumescens; B. Frullania platicalyx; C. Frullania rio-janeirensis; D. Ceratolejeunea cubensis; E. Cheilolejeunea acutangula; F. Cheilolejeunea adnata var.adnata; G. Cheilolejeunea intertexta; H. Cheilolejeunea trifaria; I. Lejeunea juruana; J. Lejeunea quinqueumbonata; K. Metalejeunea cucullata; L. Zoopsidella integrifolia; M. Zoopsidella macella; N. Lophocolea bidentata; O. Plagiochila raddiana; P. Plagiochila simplex (Scale bar: A-B, F-G, P= 20 µm; C-D, H-O= 100 µm; E= 300 µm).